In 1949, Gjon Mili, great technician and light effects specialist, visited Pablo Picasso in Vallauris (France). Presenting to him pictures, using the “Light Painting” and on which light sources have been placed on the shoes of a skater, the Albanian photographer is dragged into an improvised session of virtual drawing. Picasso, equipped with a bulb as pencil, starts to draw forms that Mili captures with a slow shutter. From it results a surprising series, commonly named “Light Drawings”, where each image shows the vivacity, the bodily relation to the painting, and, in such a way, the eye and the approach of the Andalusian. But, in addition to the genius of the two men, these photographs illustrate a technique explored during the XXth century (Man Ray, Georges Mathieu,…) that asserts the light as artistic tool and subject, which opened the way to lots of contemporary experimentations and concepts.